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Neurology: Prefrontal cortex blood oxygen level-dependent (BOLD) variability in Parkinson's disease reflects limited environmental adaptability and learned stability

 Last Update: 2022-01-23
 Source: Internet
 Author: User

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Growing evidence suggests that the prefrontal cortex (PFC) plays an important role in walking, primarily involved in planning, organization, execution, and adjustment to the environment

FNIRS measurements use light absorption to detect hemodynamic changes in the prefrontal cortex

Functional magnetic resonance imaging studies have shown that with age, blood oxygen level-dependent (BOLD) variability decreases in cortical regions, whereas BOLD variability increases in subcortical regions such as the striatum

Recently, some researchers assessed the effect of task difficulty on HBO2 variability by comparing ordinary walking and dual-task walking, and by comparing the difference between task repetitions to assess the effect of task practice on HBO2 variability to study and healthy controls.

Variability (SD, range, mean detrended time series) during dual-task walking was higher than usual walking (P<0.

This study proposes a new approach to explain changes in HBO2 variability, linking increased HBO2 variability with flexible adaptation to environmental challenges and decreased HBO2 variability with stability in performance

Source: Maidan I, Hacham R, Galperin I, Giladi N, Holtzer R, Hausdorff JM, Mirelman A.

Maidan I, Hacham R, Galperin I, Giladi N, Holtzer R, Hausdorff JM, Mirelman A.
Neural Variability in the Prefrontal Cortex as a Reflection of Neural Flexibility and Stability in Patients With Parkinson Disease.
Neurology.
2021 Dec 14:10.
1212/WNL .
0000000000013217.
doi: 10.
1212/WNL.
0000000000013217.
Epub ahead of print.
PMID: 34906983.

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